[use] Add a catch-all clause to the machine

src/hb-ot-shape-complex-use.cc

diff --git a/src/hb-ot-shape-complex-use.cc b/src/hb-ot-shape-complex-use.cc
index 249268b..67149ef 100644
--- a/src/hb-ot-shape-complex-use.cc
+++ b/src/hb-ot-shape-complex-use.cc
@@ -236,6 +236,7 @@
   numeral_cluster,
   symbol_cluster,
   broken_cluster,
+  non_cluster,
 };
 
 #include "hb-ot-shape-complex-use-machine.hh"
@@ -315,6 +316,7 @@
     {
       case independent_cluster:
       case symbol_cluster:
+      case non_cluster:
 	/* These don't join.  Nothing to do. */
 	last_form = _NONE;
 	break;